Performance evaluation of DHT based optical OFDM for IMDD transmission over diffused multipath optical wireless channel

Abstract EN

Optical OFDM based on discrete Hartley transform (DHT-O-OFDM) has been proposed for large-size data mapping intensity modulation direct detection (IM/DD) scheme as an alternative to the conventional optical OFDM.

This paper presents a performance analysis and evaluation of IM/DD optical DC-biased DHT-O-OFDM over diffused multipath optical wireless channels.

Zero-padding guard interval along with minimum mean-square error (MMSE) equalizer are used in electrical domain after the direct detection to remove the intersymbol interference (ISI) and eliminate the deleterious effects of the multipath channels.

Simulation results show that the ZP-MMSE can effectively reduce the effects of multipath channels.

The results also show that the effects of optical wireless multipath channel become more serious as the data signaling order increases.